When you travel don't forget your journal. Try to take a few minutes everyday and jot down your thoughts of the the day, the places that you visited, inspiring things that you saw, and any new ideas.
Traveling is a great time to let your mind relax and open up to new ideas. All the new sites, sounds, and smells will inspire you.
Not into writing, then try a photo journal instead. Take lots of pictures of inspiring sites, and keep a small note book with the ideas that were inspired by the picture. When you get home you can organize them to have as a future reference.
Not traveling this year, try this journal prompt to get your creative juices flowing:
On my dream vacation I want to visit/see/try/experience...